Mega Watt S-400-12 Power Supply Image

MegaWatt S-400-12 Power Supply

posted in: Power Supplies | 3

The MegaWatt S-400-12 Power Supply is designed for powering HAM radio equipment. The output section of the power supply is highly filtered to eliminate RF in the output voltage. It is rated for 30 amps at 100% duty cycle, and 36 amps at 90% duty cycle with a dc voltage selection between 10-13.8 volts.

MegaWatt Power Supply Resources

You can purchase the MegaWatt S-400-12 Power Supply on Amazon.

There is an article on the website about the MegaWatt S-350-12 Power Supply.

Reviews can also be found at the eHam for the MegaWatt S-400-12 Power Supply.

3 Responses

  1. KK6JYT
    | Reply

    I own two of these and have had them running continuously for about a year now. The only problem I had is with a fan making noise on one of them. This was easily fixed by replacing the fan ( ). I have not had any further problems since. Highly recommended.

  2. Juan B Collazo
    | Reply

    Hello my name is juan collazo i bought s 400 about 4 month ago and the fan is making noise, is there any way way i can get a new fan, to replace thanks

    • KK6JYT
      | Reply

      Hi Juan,

      I had the same issue with mine after I blew the dust away (cleaned it) with compressed air. I now use a vacuum (suction) instead. Fixing it yourself is cheaper than paying for the shipping to send it back to be repaired by the supplier. Click this link ( ) to see the fan I used to replace mine with. I have not had a problem for two years now after the repair. The only difference is that you will need to place the fan on the outside of the power supply.

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